Are North American governments secretly conspiring to build a "NAFTA superhighway," four football fields wide, from Mexico to Canada to bypass regulatory controls and whisk goods swiftly to market?

If you believe some right-wing websites in the United States, it's all but a fait accompli. They insist a gargantuan project is in the works that will carve a 365-metre-wide swath through the continent's heart, with 10 traffic lanes, rail lines for freight and passenger trains, fibre-optic cable lines and pipelines carrying oil, gas and water.

I'm not sure about the super highway, but I am sure about the North American Union....

Would said "North American Union" be on the model of the European Union and/or the MERCOSUR such in South America?

And how would said "North American Union" be seen as undermining the "antient and pecuilar" soverignty of the United States (as if same mattered all the more for National Identity and Cohesion, howbeit warped in the crudest way possible)?